Speed-changing mechanism.



0. SGHNITZ LER.

SPEED CHANGING MECHANISM.

APPLICATION FILED AUG. 12,1912- Patented Apr. 7, 1914.

- 4 SHEETS-SHEET 1.

Jaye/1101' 0. SGHNITZLER.

SPEED CHANGING MECHANISM.

APPLICATION 11 111) AUG. 12, 1912.

Patented Apr. 7, 1914.

4 SHEETS-SHEET 2.

In varzzor' M'Inasss ray. 4% W1 '0. SGHNITZLER. SPEED CHANGINGMECHANISM.

APPLICATION FILED AUG. 12, 1912.

Patented Ap'r.7, 1914 4 SHEETS-SHEET 3.

Q vaM Minesses 0. E CHl IITZLI:|"R.-

SPEED CHANGING MECHANISM. I APPLICATION FILED we. 12, 1912.

- Wz't mssses v UNITED s'rATEsPATENT OFFICE.

OSCAR SCHNITZLER, OF REMINGTON, OHIO.

SPEED-CHANGING MECHANISM.

To all whom it may concern Be it known that I, OSCAR SCHNITZLER, acitizen of the United States, residing at Remington, in the county ofHamilton and State of Ohio, have invented certain new and usefulImprovements in Speed-Chang ing Mechanism, of which the following is aspecification.

It is the object of my invention toprovide novel means in speed changingmechanism whereby a change in relation in the power transmittingelements is readily effected.

My invention is em'ployable in various relations, but I .prefer to showthe same in connection with a power transmitting device suitable for useon a traveling vehicle, as an automobile.

It is a further object ofmy invention to provide fluid actuating meansfor the movable member of the speed-change parts; fur ther to providenovel relation of elements whereby, upon initiation of movement in theactuatingmeans, the operative connection in the main drive clutch isrelieved prior to. the engagement of the movable member of. thespeed-change parts in new relation;

, further to provide novel means whereby the changes in relation in thespeedchange parts take place in sequences of increasing or decreasingspeed relations; further to provide novel locking mechanism formaintaining the parts in acquired positions; and, further to providenovel means for controlling the duration of actuation of the actuatingmeans from a member concerned in cans ing change in driving relation inthe speedchange parts. I

The invention will be further readily un derstood from the followingdescription and claims, and from the drawings, in which latter:

Figure l is a view showing the operative parts of my improved device inside elevation and the casing in section on the irregular line 11 ofFig.3, for exposure of the interior of the casing. Fig. 2 is across-section of'my improved device on the irregular line 2-2 of Fig. 1.Fig. 3 is a cross-section of my improved device on the irregular line33,o f Fig. 1. Fig. 4 is a plan section of my improved device on theline 4-4 of Fig.

' 1. Fig. 5 is a plan'section of my improved device on the line 55 ofFig. 1, partly broke'naway. Fig. 6 is a side elevation, partly brokenaway, and partly in section, showing my improved device in connectionwith the main drive-clutch and operating Specification of. LettersPatent.

Patented Apr. 7, 1914.

Application filed August 12, 1912. Serial No. 714,624.

taken on the line 8-8 of Fig. 4. Fig. 9 is a cross-section of the latter011 the line 9 of Fig. 8; and, Fig. 10 is a side elevation, partly insection on the line l010 of Fig. 2, showing the locking means'for theshift-ing mechanism.

11' represents the casing of my improved device and is arranged to besuitably mounted, for instance on a propelled vehicle such as anautomobile.

12 is the drive-shaft operated in suitable manner, as from the fly-wheel13 of an internal combustion motor having driving connection with thedrive-shaft by means of the usual main drive clutch 14, normally held inoperative relation by a spring 15, and arranged to be released by aclutch-lever 16 having a fork 17 provided with pins 18 received in anannular groove 19 in one of the clutch-members, for releasing theclutch. The drive-shaft is mounted in a bearing 20 in the casing. It hasa suitable driving gear 21 secured thereto.

25 is a driven-shaft, the journal stud 26 of which has bearing in thedriving gear. The driven shaft is also shown journaled in a bearing 27of the casing. If used in connection with an automobile, the drivenshaft has suitable connection withthe driven axle of the same.

28 is a sleeve slidable lengthwise on the driven shaft, the portion 29of the driven shaft on which this sleeve slides being shown polygonal incross-section, the bore of the sleeve being of mating cross-section.There is a clutch 30 between the gear 21 and the sleeve for directlyconnecting the drive-shaft with the driven shaft, in the presentinstance imparting high speed." Gears 31, 32, are on the sleeve 28. t

36 is an intermediate shaft journaled in bearings 37 of the casing andhaving gears 38, 39, 40 and 41 fixed thereon.

42 is a reversing gear journaled on a stud 43 mounted in a bearing 44 ofthe casing, the gear 42 being in continuous mesh with the gear .41.

The sleeve 28 is movable lengthwise on the shaft 25 for causingengagement of the clutch faces Ofclutch 30, whereby high speed istransmitted from the drive-shaft to the the gear 31 and the gear 39whereby'an intherewith being shown as a tel-mediate speed is transmittedfrom the drive-shaft to the driven-shaft through the gears 21, 38, 39and 31; for causing meshing between the gear 32 and the gear 40, wherebylow speed is transmitted from the drive-shaft to the driven shaftthrough the gears 21, 38, and 32; or for causing meshing between thegear 32 and the reversing gear 42, whereby reverse movement at low speedis imparted to the driven shaft from the drive-shaft through the gears21, 38, 41, 42 and 32.

I will now describe the novel mechanism I employ for causing movement ofsaid gearsleeve, this gear-sleeve .being instanced as a movable memberof the train of gears for efiecting change of relation in the powertransmitting elements.

is a fork received in an annular groove 51 in the sleeve 28. The fork ismounted on a slide 52 slidablelengthwise on a rod 53, the said rod beingpolygonal in cross-section and the slide-connection ofthe slide bearing54 of corresponding cross-section.

' 55 is a positioning bar secured to the slide. The'positioning bar maybe made in one or more parts and has the purpose of positioning the forkso. as tocau'se proper meshing of the gears of the power transmittingelements. I have further provided novel means for moving said slide andlocking the same in actuated, positions, these means causing movement ofthe slide in steps in increasing or decreasing speed relations'or forreversing the power transmission.

ments 56, 57, 58, effective in one direction of movement of thepositioning bar, and with abutments 59, 60 and61, efi'ective in theoppositedirection of movement of the ositionin bar. It isalso providedwitha ock 62 wiiich comprises notches 63, 64, 65, 66, into any one ofwhich a keeper 67 is arranged to be received, the lockbeing arrig Diedto be released just prior to actuation o t e positioning bar and to bemaintained,

in inactive relation until the positioning bar completes its step ofmovement. For efi'ecting this movement, I provide a traveling block 71on which arms 72, 73, are pivote 1 about a stud 74, the arm 72 beingprovided.

with a pin 75 and the arm 73 being provided with a pin 76, a s ring 77between a tail 78 of the arm 72 an a pm 79 on the block 71 maintainingthe pin 75 inoperative relation with a cam-block 80, and a spring 81between a tail 82 on the arm 73 and a pin 83 on the traveling block 71maintaining the pin 76 in proper relation with a cam-block 84. Thecam-block is secured to the easing on a bracket 85 and the cam-block 84is secured to the casing on a bracket 86.

87 is a pull-rod articulated at 88 to the main clutch-lever 16. Thelever 16 is pivoted to a suitable stationary part of the automobile, ason a rod 89, and is provided with a usual treadle 90. The pull-rod ispreferably provided with a lost-motion device operative in onedirection, shown as a joint 91 comprising a knob 92 on the sect-ion 93of the pull-rod, arranged to have longitudinal movement in a pocket 94in the section 95 of the pull-rod, the knob being normally seatedagainst the outer end-wall 96 of the pocket, so that, when the section93 of the pull-rod is pulled, thelever 16 will be actuated for releasingthe main drive-clutch, whereas, if the treadle is operated, the sectionof the pull-rod'will move longitudinally on the section 93 withoutmoving the latter, the section 95 and the treadle being at oppositesides of the pivot 89 of said lever 16.

98 is a bell-crank lever comprising an arm 99 rigidly secured to arockerin 100 journaled in a bearing 101 andhavlng the other arm 102 ofsaid bell-crank lever secured thereto. The arm 99has articulation 103with the pull-rod 87.

This bell-crank lever comprises an arm 107 having articulation at- 108with the pull-rod 87 and also comprises an operated arm 109.

The normal idle relations of the actuating parts are shown in thedrawings, the driving relation of the power transmitting elementsbeing'shown as a relation for transmitting intermediate speed. Assumingnow that a change of speed from intermediate to low is to be eflected,the traveling block 71 will be caused to move in the direction of thearrow (1. Upon initiation'of this movement, the pin 7 5 wiil be guidedby the cam-face 110 on the cam-block 80 and strike the striker-face 111of the arm 102, thereby swinging the bell-crank lever 98, and pulling onthe pullrod 87 and releasing the main drive-clutch, I

the gearing arts however continuing their movements no to inertia. Thebell-crank lever 104 will also have been moved by the movement of thepull-rod and thereby re- 'lease the keeper 67 from the notch 64 in whichithas been positioned, this keeper being mounted on an arm 112 on thebellgear 39 and engagement between the gear levers acting idly.

32 on said sleeve and the gear 40, and thereby place said powertransmitting elements in relation for transmitting low'speed. Until thisnew engagement of the latter parts has been effected, the pin travelsalong the lower face 113 of the cam-block 80, and when this new relationof gearing in the power transmitting elements has been effected, the in75 would have reached the end of said ower face of the cam-block and beurged upwardly by the spring 77 for bringing said pin into cotiperativerelation with the cam-face 114 on said ca'm-blo ck 80, so thatretraction of the traveling block 71 to initial position may be effectedwithout rengagement of said pin with any of the operating parts, the pinin this retraction climbing upon the cam-face 114 and along the upperedge of the cam-block 80, and returning to initial position above thestriker face 111, which has been meanwhile returned to initialposit-ion, for, when the fork 50 has completed its movement for the stepin transmission relation justeffected, the keeper 67 will enter the nextnotch 65 of the traveling block for locking the traveling block andslide in said step of power transmitting relation. If on the other handit is desired to effect a change of relation in the power transmittingelements from intermediate to high speed, the block 71 is caused'to movein the direct-ion of the arrow b. Upon-initiation of this movement thepin 76 will engage the inclined cam-face 115 on the camblock 84 andengage the end of the arm 109 for rocking the bell-crank lever 104,whereby the pull-rod is moved for'disengaging the main drive-clutch andthe keeper released from its notch in the lock 62.

It will be noted that in the construction described, both of thebell-crank levers 98 and 104 move upon actuation of either of saidbell-crank levers, one of said bell-crank The pin 76 will next engagethe abutment 59 for moving the traveling block 71 and the slide 52 inthe-direction of the arrow 1), whereby engagement is caused between thefaces of the transmitting clutch 30, the pin being held in engagementwith said abutment by the lower face 116 of the cam-block 84. Whenproper engagement has been caused between the members of the powertransmitting elements in their new relation, the pin 76 will havereached the end of said lower face and be caused to move upwardly by thespring 81, thetraveling block being then retracted to initial positionand the pin 76 traveling along the inclined cam-face 117 and the upperedge 118 of the cam-block 84 to initial position.

For effecting movement of the traveling block 71, I connect the samewith a pistonrod 121, in the present exemplification shown as carryingpistons 122, 123, in cylinders 124, 125. For maintaining said pistons innormally inactive relation, I provide springs 126, 127, acting inopposite directions upon the piston-rod, as by being received in bores128, 129, acting in reverse directions against the opposite ends 130,131, of said bores and on a lug 132 on said piston-rod between saidsprings.

For adjusting the end thrust of the pistons, I provide oppositelyextending stoprods 133, 134, which extend from said lug 132 and arearranged to respectively engage oppositely extending contact rods 136,137,

respectively threaded in bearings 138, 139, v

The port 145 is connected by a passage 147 with a port 148 in thecylinder 125. The port- 146 is connected by a passage 149 with a port150 in the cylinder 124.

151 is an inlet-port which communicates with either port 145, 146. Thereis a suitable pressure supply for fluid, under pres-' sure, which fluidmay be air, and the supply obtained from a pressure-tank 153, a fluidpassage 154 being between the pressure tank and the inlet-port 151. Thepassage 154 connects with a port 155 in a crosspiece 156 of thevalve-casing, this port communicating with an arcslot 157 in thevalve-plug, (see Figs. 2 and 9), the arc-slot communicating with theinlet-port 151.

158, 159, are outlet-ports in the valvecasing, and 160, 161, areoutlet-passages in the plug of the valve.

When the valve-plug 143 is rocked to cause registry of the port 151 withthe port 145, a movement of the pistons 122, 123, will be caused in thedirection of the arrow a, the rocking of the valve-plug causing registryof the passage 161 with the ports 146 and 159 for permitting exhaust ofthe cylinder 124. Both cylinders are normally open to the air.

If the valve-plug is rocked for causing 146, a movement of the pistonswill be caused in the direction of the arrow 6, and registry of theoutlet passage 160 with the ports and 158 will also be caused forpermitting exhaust of the cylinder 125.

The normal positioning of the inlet-port 151 against the blank wall 162of the valvecasing is caused by springs 163, 164. The spring 163 islocated between a pin 165 on the valve-plug and a pin 166 on a bracket167 of a support 168, of which the valvecasing may be a part. locatedbetween a pin 169 on the valve-plug and a pin 170 on a bracket 171ofsaid support.

For causing rocking of the valve-plug, I provide an armature-slide 174comprising side-pieces 17 5 sliding in hearings 176 in the valvccasingand connected by armature plates 177, 178. Each of the side-pieces has aslot-bearing 179 in which a pin 180 on the valve-plug is received, thispin being eccentrically placed on the valve-plug, so that, uponlongitudinal movement of the armatureslide, the valve-plug will berocked in .its casing for causing registry of the various ports. Theside-pieces also hold the valveplug' in longitudinal position in itscasing.

181, 182 are electro-magnets of suitable form mounted respectively onthe brackets 167, 171. Suitable electrical connections are provided forthe magnets for energizing the.

same for causing selective energizing of the magnets 181 or the magnets182 for rocking the valve-plug in either direction, and therebyinitiating movement in either direction of the actuating mechanism foractuating the movable member of the power transmitting elements forefi'ecting change of speed relation therein. This electric device may beautomatic, in which case it is preferab-ly actuated by the'drivenelement, as through the medium of a suitable governor controlled by thespeed of said driven element, which latter may be the driven axle of anautomobile. I have however preferred to show a manual means forcompleting the circuits which energize the magnets and therebyinitiating the movement in said actuating mechanism for causing changeof speed relation in the power transmitting ele-. ments.

186 represents the battery. An electric conductor 187 connects one ofthe poles 188 of the battery with one of the oles 189 of theelectro-magnets 181. An =e ectric conductor 190'connects the other pole191 of the electro-magnet 181 with the other pole 192 of the battery. Anelectric switch'193 is interposed in the conductor 190, this switchbeing normally in open relation, induced by a spring 194.

nects the pole 188 of the battery with.one of the poles 196 of theelectro-magnets 182, preferably by being connected to the elec tricconductor 187 at 197.

, 198 is an electric conductor which connects the other pole 199 of theelectro-magnets 182'with the other pole of the battery, preferably byconnecting with the. electric The spring 164 is Letters Patent, is: 195is an electric-conductor whichconswitch is open, it places theelectro-magnets out of commission and maintains the movable member ofthe power transmitting elements in its located relation, so that thespeed relation in the power transmitting mechanism may be constant.

When the electric switch 203 isin connecte'd relation, a connection ofshort duration in either the electric switch 193 or the electric switch201 will cause energizing of the respective electro-magnets 181, 182,for

causing a rocking of the valve-plug and bringing its inlet-port intoregistry with either of the ports 145, or 146, for actuating thepistons, whereupon movement of the traveling block 71 will be initiatedfor initiating. longitudinal movement in the positioning bar 55.

In order to maintain the valve in open relation until the step ofmovement of the slide 52 is, completed, I provide a lock 205- for saidvalve. This lock comprises a lug 206 on the valve-plug, which forms akeeper which cotiperates with notches 207, 208, 209 and 210 in a bar211, the bar having lugs 212 between said notches against which thekeeper slides for maintaining the ports of the valve in open relationuntil the movement of the slide 52 and'the change in speed relation ofthe power transmitting elementhas been effected, upon which the keeperis ment coincident with the movement of the positioning bar 55 and maybe a part of the same as shown.

The valve and magnet parts may be assembled on the support 168, whichlatter is arranged to be received into the casing through an opening 213and rest on seats 215, 216, in the casing and'be secured in place bysuitable bolts. The parts and con- 1 nections therefor may receiveattention through said opening, which is arranged to be closed by a door214. v

Having thus fully described my invention, what I-claim' as new anddesire to secure by v1. In speed changing mechanism, the combination ofspeed-change parts comprising a movable power-transmitting member mov-'able into a-plurality of positions effecting a plurality of changesofispeed, and a fluid- ,c at

. permitted to enter the next notch on the bar 1 I actuated device.arranged for operative con- 2. In speed changing mechanism, thecombination of. speed-change parts comprising a movable member foreffecting the changes of speed, a fluid-actuated device arranged foroperative connection with said movable member for moving the same foreffecting said speed-changes, and means embracing an electrictranslating device for initiating movement in said fluid-actuateddevice.

3. In speed changing mechanism, the combination of a driving member, adrive clutch therefor, a driven member, speedchange parts between saidmembers comprising a movable member, a fluid-actuated element arrangedfor operative connection with said drive-clutch for relieving the sameand for operative connection with said movable member for moving thesame.

4. In speed changing mechanism, the combination of a drivingmembercomprising a drive-clutch, a driven member, speed-change partsbetween said members-comprising a movable member, shifting means forrelieving said drive-clutch, shifting means for moving said movablemember, and a traveling member having spaced operative connections withsaid respective shifting means, the spacing in said operative connectionfor said first-named shifting means being shorter than for saidlast-named shifting means.

5. In speed changing mechanism, the combination of speed-change partscomprising a movable member, a shifting member for the latter for movingthe same in opposite directions for increasing or decreasing speeds, anda fluid-actuated means arranged for operative connection with saidshifting member in both directions of its movement for moving the samevfor effecting said with, and cam-mechanism for the latter fordeflecting the same into range of said shifter.

7. In speed changing mechanism, the combination of speed-change partscomprising a movable member movable in opposite directions, adrive-clutch having operative connectlon wit-h said speed-change parts,a moving part having operative connection with said drive-clutch forrelieving the same, a shifter having operative connection with saidmovable member, an actuating device for said moving part and for saidshifter normally out of range of said moving 'part and shifter, andcam-mechanism for said actuating device. for moving the same into rangeof said moving part and said shifter in the order named.

8. In speed changing mechanism, the coma movable member, a shiftertherefor, an actuating device for said shifter normally located in aninitial position, means for moving said actuating device in oppositedirections, said actuating device comprising coacting parts for saidshifter normally in inactive relation, and cam-mechanism for moving saidcoacting parts into active relation.

10, In speed changing mechanism, the combination of speed-change partscomprising a movable member for effecting the changes of speed, atraveling part arranged for moving said movable member, and com pressedfluid piston mechanism having operative' connection with said travelingpart for actuating said traveling part.

11.111 speed changing mechanism, the combination of speed-change partscomprising a movable member for effecting the changes of speed, atraveling part for actuating said movable member, compressed fluidpiston mechanism having operative connection with said traveling partfor moving said traveling part, said last-named mechanism comprising avalve, and automatic controlling means for said valve having operativeconnection with a movable part concerned in speed-change.

12. In speed changing mechanism, the combination of a driving member, adriveclutch therefor, a driven member, speedchange parts between saidmembers comprising a movable element, a movable element havingconnection with said driveclutch 'for relieving the same, a travelingpart for actuating said movable elements,

and compressed fluid actuating means for actuating said traveling part.

13. In speed changing mechanism, the combination ofa driving member, adriveclutch therefor, a movable element for actuating said drive-clutch,a driven member, speed-change parts between said driving and drivenmembers comprising a movable element, a traveling member for actuatingsaid movable-elements in the order named, and compressed fluid pistonmechanism for moving said traveling member,

14. In speed changing mechanism, the combination of-a driving member, adrive- .clutch therefor, a movable element for actuating saiddrive-clutch, a driven member, speed-change parts between said drlvmgand driven members compmsmg a movable element, a traveling member foractuating said ing a movable member, a shifter for said movable member,said shlfter comprising abutments, an actuating device for saidabutments normally out of range therewith,

and a cam for directing said actuating device into range of saidabutments, and

means for moving said actuating device.

16. In speed changing mechanism, the combination of a driving member, adriveclutch therefor, an abutment having connection With saiddrive-clutch for relieving the same, a driven member, speed-change.parts between said driving member and driven member comprising a movablemember, a shifter for said movable member comprising an abutment, anactuated member having a part thereon coacting with said abutments, anda cam for directing said coactingpart into range of said first-namedabutment and said second-named abutment in the order named.

17. In speed changing mechanism, the combination of a driving member, adriveclutch therefor, an abutment having connection with saiddrive-clutch for relieving the same, a driven member, speed-change partsbetween said driving member and driven member comprising a movablemember, a shifter for said movable member comprising an abutment, anactuated member having a part thereon coacting with said abutments, anda cam for directing said coacting part into range ofsaid first-namedabutment and .said second-named abutment in the order 19. In speedchanging mechanism, the

combination of speed-change parts comprising a movable member, a shifterfor said movable member, fluid-actuated means for moving said shifter,said fluid actuated means comprising a valve embracing a movableelement, an electric translating device for moving said movable element,and arresting means for said movable element for maintaining said valvein open relation betweenlimits of movements of said shifter.

20. In speed changing mechanism, the

combination of speed-change parts comprising a movable member, a shifterfor said movable member, a fluid-actuated means for moving said shifter,said fluid-actuated means comprisin g a valve embracing a movableelement, an electric translating device for moving said movable clement,arresting.

means for said movable element for maintaining said valve in openrelation between A limits of movements of said shifter, and a lock forsaid shifter controlled by said fluidactuated means.

21. In speed-changing mechanism, the combination of speed-change partscomprising a movable member, a shifter for said movable member, adrive-clutch, a movable part for relieving the connection in said driveclutch, fluid actuated means, said fluid-actuated means comprising avalve embracing a movable element, an electric translating device formoving said movable element, arresting means for said movable elementfor maintaining said valve in open relation between limits of movementsof said shifter, said fluid actuated means having operative connectionwith said movable part and said shifter for actuating the same.

acting means into range of saidfrespecti've abutments.

23. In speed changing mechanism, the combination of a driving member, adrive clutch therefor, a driven member, speedchange'parts between saiddriving member and driven member comprising a movable member, a shifterfor said movable member, abutments for said shifter for ascending speedratios oppositely disposed abutments for said shifter for descendingspeed ratios, abutments for said drive-clutch adjacent to saidrespective oppositely disposed abutments, a traveling part, oppositelydisposed coacting parts thereon-for said abutments, and oppositelydisposed cams for-said coacting parts for directing the same intocoact-ion with said respective abutments forsaid drive-clutch forrelieving said drive-clutch and into range of'said respective abutmentsfor said shifter.

24-. In speed changing mechanism, the combination of speed-change partscomprising a movable member, a drive-clutch therea prising oppositelydisposed series of abutments, actuating means for relieving saiddrive-clutch comprising abutments adjacent to said last-named series ofabutments, a traveling block, oppositely disposed contactarts thereon,and oppositely disposed cams or directing said respective contact-partsinto coaction with said respective abutments for said drive-clutch andsaid respective series of abutments for said shifter.

25. In speed changing mechanism, the combination of speed-change partscomprising a movable member, a shifter for said movable member movableinopposite directions with step-by-step movements, anactuating part forsaid shifter movable in opposite directions, means for automaticallyreturning said actuating part to initial positions, and coacting meansbetween said actuating part andsaid shifter for moving said shifter andoperable in both directions of movement of said actuating part.

26. In speed changing mechanism, the combination of speed-change partscomprising a movable member, a shifter for said movable member movablein opposite directions with step-by-step movements, an actuating partfor said shifter movable in opposite directions, means for moving saidac-.

tuating part comprising a valve, means for automatically returning saidactuating part to initial positions, coacting means between saidactuating part and said shifter for moving said shifter and operable inboth directions of movement of said actuating part,

- and means moving with said shifter maintaining said valve in openrelation between limits of the respective steps of movement of saidshifter.

27. In speed changing mechanism, the combination of speed-change partscomprising amovable member, means for moving said movable member foreffecting speed change embracing a valve comprlslng a movchange, ashifter for said movable member,

oppositely disposed series of abutments for said shifter, a travelingblock, oppositely disposed arms and contact parts thereon pivoted onsaid traveling-block, said contact parts normally out of range of saidabut- 'ments, a piston-part actuating said traveling block, resilientmeans for returning said piston-part to initial positions, andoppositely dispbsed cams for moving said contact parts into ran e ofsaid abutments.

29. In speed c anging mechanism, the

combination of speed-change parts comprising a movable member foreffecting speedchange, a shifter for said movable member, oppositelydisposed series of abutments for said shifter, a traveling block,oppositely disposed arms and contact parts thereon pivoted on saidtraveling block, said contact parts normally out of range of said abut-.

ments, a piston-part actuating said traveling block, resilient means forreturning said piston-part to initial positions, oppositely disposedcams for moving said contact parts into range of said abutments, a maindriveclutch and abutments having operative connection with said maindrive-clutch for relieving the same, said last-named abutments normallyin positions between said contact parts and the respective abutments ofsaid series of abutments.

30. In speed changing mechanism, the combination of speed-change partscomprising a movable member for effecting speedchange, a shifter forsaid movable member, oppositely disposed series of abutments for saidshifter, a traveling block, oppositely disposed arms and contact partsthereon pivoted on said traveling block, said contact parts normally outof range of said abutments, :1 piston-part actuating said travelingblock, resilient means for returning said piston-part to initialpositions, oppositely disposed cams for moving said contact parts intorange of said abutments, a lock for said shifter, and abutments havingoperative connection with said lock for releasing the same,

said last-named abutments normally in positions between said contactparts and the respective abutments of said series of abut ments.

31. In speed changing mechanism, the combination of speed-change partscomprising a movable member, a drive-clutch, a shifter for said movablemember comprising oppositely disposed series of abutments, means forrelieving said drive-clutch comprising abutments adjacent to said seriesof abutments, a traveling block, oppositely disposed contact-partsthereon, and oppositely disposed cams for directing said respectivecontact-parts into coaction with said respective abutments for saiddrive-clutch and said respective series of abutments for said 1 shifter,a lock for said shifter, and actuatingmeans for said lock havingoperative connection with one of said abutments for said drive-clutch.

In testimony whereof, I have signed my name hereto in the presence of.two subscribing witnesses.

I OSCAR SGHNITZLER. Witnesses Tnos. F. MoGu-mn, THERESA SILBER.

